Results 91 to 100 of about 11,347 (200)

Unveiling plasmid diversity and functionality in pristine groundwater

open access: yesEnvironmental Microbiome
Background Plasmids are key in creating a dynamic reservoir of genetic diversity, yet their impact on Earth’s continental subsurface—an important microbial reservoir—remains unresolved. We analyzed 32 metagenomic samples from six groundwater wells within
Olga María Pérez-Carrascal   +3 more
doaj   +1 more source

Diversity and biosynthetic potential of culturable aerobic heterotrophic bacteria isolated from Magura Cave, Bulgaria [PDF]

open access: yes, 2013
Biocapacity of bacteria inhabiting karstic caves to produce valuable biologically active compounds is still slightly investigated. A total of 46 culturable heterotrophic bacteria were isolated under aerobic conditions from the Gallery with pre-historical
Kambourova Margarita   +4 more
core  

The Impact of Host Rock Geochemistry on Bacterial Community Structure in Oligotrophic Cave Environments. [PDF]

open access: yesInternational Journal of Speleology, 2007
Despite extremely starved conditions, caves contain surprisingly diverse microbial communities. Our research is geared toward understanding what ecosystems drivers are responsible for this high diversity. To asses the effect of rock fabric and mineralogy,
Hazel A. Barton   +5 more
doaj  

Microbial Community Structure and Arsenic Biogeochemistry in Two Arsenic-Impacted Aquifers in Bangladesh

open access: yesmBio, 2017
Long-term exposure to trace levels of arsenic (As) in shallow groundwater used for drinking and irrigation puts millions of people at risk of chronic disease.
Edwin T. Gnanaprakasam   +7 more
doaj   +1 more source

Biogeochemical Changes During Bio-cementation Mediated by Stimulated and Augmented Ureolytic Microorganisms. [PDF]

open access: yes, 2019
Microbially Induced Calcite Precipitation (MICP) is a bio-mediated cementation process that can improve the engineering properties of granular soils through the precipitation of calcite.
DeJong, Jason T   +3 more
core  

Discovery Prospects for a Supernova Signature of Biogenic Origin

open access: yes, 2011
Approximately 2.8 Myr before the present our planet was subjected to the debris of a supernova explosion. The terrestrial proxy for this event was the discovery of live atoms of 60Fe in a deep-sea ferromanganese crust.
Basu   +27 more
core   +1 more source

Interrelationship of hydrology, microbial colonisation and hydrometallurgy in a simulated chalcopyrite heap leach [PDF]

open access: yes, 2008
Includes bibliographical references (leaves 104-115).Chalcopyrite is the most abundant primary copper sulphide mineral found worldwide. As copper grades of ores available for extraction decrease, heap bioleaching is gaining interest as a potential ...
Spurr, Nicholas Robert Louis
core  

Presencia de Pool Fingers y u-loops en la Cova des Pas de Vallgornera (Mallorca, España) [PDF]

open access: yes, 2010
[spa] En este trabajo se da a conocer la presencia de unos espeleotemas muy particulares, pool fingers y u-loops, que se desarrollan en gours de la Cova des Pas de Vallgornera y que podrían indicar una influencia de actividad bacteriana en su ...
Fornós, Joan Josep, Merino, Antoni
core  

Geodiversity as a Driver of Soil Microbial Community Diversity and Adaptation in a Mediterranean Landscape

open access: yesLand
Extreme meteorological events and anthropogenic influences determine important variations in microbial community composition. To know the extent of these variations, it is necessary to delve deeper into the geogenic factors to be considered as a baseline.
Samuel Pelacani   +4 more
doaj   +1 more source

Genome streamlining in Parcubacteria transitioning from soil to groundwater

open access: yesEnvironmental Microbiome
Background To better understand the influence of habitat on the genetic content of bacteria, with a focus on members of Candidate Phyla Radiation (CPR) bacteria, we studied the effects of transitioning from soil via seepage waters to groundwater on ...
Narendrakumar M. Chaudhari   +4 more
doaj   +1 more source

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